Why are mudflats difficult for organisms to live in the sediment compared to sandy beaches?
a. The exposure time of mudflats threatens desiccation
b. There is an over-saturation that occurs in mudflats.
c. The silt is porous.
d. Packed silt interferes with circulation of water.
d
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Despite GC pairs having an additional hydrogen bond than AT pairs, hyperthermophilic Archaea generally have a lower GC ratio in their genomes when compared to other heat-sensitive prokaryotes
Indicate whether the statement is true or false.
What could be a possible consequence if a structural gene's TATA box is mutated?
A. The transcriptional start site may not function properly. B. Transcription may start at a variety of sites. C. Unusable transcripts may be produced. D. The preinitiation complex may form at the wrong site. E. All of the choices are correct.
How many chromosomes should be in an endosperm nucleus?
A) 8 B) 16 C) 24 D) 32
What enables the copied chromosomes to separate during binary fission?
a. The nuclear membrane dissolves. b. The mitotic spindle drives the separation. c. The septum splits the replicated chromosomes. d. The chromosomes are attached to different parts of cell membrane, which elongates and thus separates the chromosomes.